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Finding the Fourth Proportional to 886.10, 1,328.18 and 561.64

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Solution

The fourth proportional to 886.10, 1,328.18 and 561.64 is: 841.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.10 : 1,328.18 = 561.64 : x
  2. Step 2: Convert to fraction form
    886.10/1,328.18 = 561.64/x
  3. Step 3: Cross multiply
    886.10x = 1,328.18 × 561.64
  4. Step 4: Simplify right side
    886.10x = 745,959.02
  5. Step 5: Solve for x
    x = 745,959.02/886.10
  6. Step 6: Final answer
    x = 841.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.